Louis III, Duke of Württemberg

Louis III, Duke of Württemberg, (; 1 January 1554, in Stuttgart – 18 August 1593, in Stuttgart) was a German nobleman. He was the Duke of Württemberg, from 1568 until his death.

The only surviving son of Christoph, Duke of Württemberg and Anna Maria of Brandenburg-Ansbach, Louis succeeded his father on his death on 28 December 1568. His reign was at first under the guardianship of his mother Anna Maria von Brandenburg-Ansbach, Duke Wolfgang von Zweibrücken and Margraves George Frederick, Margrave of Brandenburg-Ansbach and Charles II, Margrave of Baden-Durlach, in the name of Count Heinrich II zu Castell.

Marriages Louis married twice. On 7 November 1575, he married Dorothea Ursula (20 June 1559 – 19 May 1583), a daughter of Margrave Charles II of Baden-Durlach and Anne of Veldenz. His second wife was Ursula (24 February 1572 – 5 March 1635), a daughter of Count Palatine George John I of Zweibrücken-Veldenz. Both marriages were childless.